GrassBase - The Online World Grass Flora

Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Sclerodactylon

HABIT Perennial. Stolons present. Culms erect; 40–60 cm long. Ligule a fringe of hairs. Leaf-blades stiff. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence composed of racemes.

Racemes paired; unilateral. Rhachis angular; terminating in a sterile spikelet. Spikelet packing broadside to rhachis; crowded; 2 -rowed.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–40 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 5–20 mm long; breaking up at maturity; disarticulating below each fertile floret, or below groups of fertile florets. Rhachilla internodes definite.

GLUMES Glumes persistent; shorter than spikelet. Lower glume ovate; 0.75 length of upper glume; coriaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute. Upper glume ovate; 0.5 length of adjacent fertile lemma; coriaceous; 1-keeled; 1 -veined. Upper glume apex acute; muticous, or mucronate. Upper glume awn subapical.

FLORETS Fertile lemma ovate; coriaceous; wingless; 3 -veined. Lemma midvein scaberulous. Lemma lateral veins obscure. Lemma surface unwrinkled; without grooves. Lemma apex acute. Palea keels winged; scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; fleshy.

FRUIT Caryopsis with free soft pericarp; ellipsoid; laterally compressed; trigonous. Embryo 0.3 length of caryopsis.

DISTRIBUTION Africa.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.